Kiel 2011 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 3: Umwelttechnik / Mikroplasmen / Diagnostik
P 3.5: Vortrag
Dienstag, 29. März 2011, 12:00–12:15, HS H
On the reactivity of plasma stimulated catalytic surfaces — •Dmitry Lopatik1, Marko Hübner1, Daniil Marinov2, Olivier Guaitella2, Antoine Rousseau2, and Jürgen Röpcke1 — 1INP, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany — 2LPP, Ecole Polytechnique, UPMC, Université Paris Sud-11, CNRS, Palaiseau, France
The pollution abatement from gas exhausts to achieve best air quality is an important contribution for environmental and health protection. Catalysts with increased reactivity can lead to a more efficient reduction of volatile organic compounds (VOC) and other harmful gases. The stimulation of catalytic surfaces via plasma treatment is an innovative approach but far from being fully understood. Recently it has been shown that catalytic surfaces like quartz, TiO2, Al2O3 and Pyrex exposed to low pressure N2/O2 plasmas can adsorb reactive atomic species. In the present study the reactivity of plasma stimulated catalytic surfaces has been investigated by analyzing the oxidation of hydrocarbons into CO and CO2. In the reaction volume the temporal evolution of molecular concentrations has been monitored using quantum cascade laser absorption spectroscopy (QCLAS) in the mid infrared spectral range. The influence of parameters, as e.g. gas mixture, temperature, pressure and power, of the plasma treatment of catalytic surfaces on the kinetics of chemical processes was in the center of interest. The analysis of the hydrocarbon reduction and carbon oxide production rates provides information about the density of adsorbed species and the character of surface chemistry phenomena.